This is the Association of Tennis Professionals (ATP) tour website that has all of the information that you might need about the ATP tour. You will also find information about different famous tennis players and any news about events. You will also find other sorts of articles about the players on this website.
This is a website explaining how the game of tennis is played, and the rules that go along with it. You will find any information you need to play a game of tennis including the object of the game, players & equipment, scoring, winning the game, and finally, the list of rules.
This is the offical United States Tennis Association (USTA) website. This website will have the answers to any questions you have about tennis, and any additional information about tennis. This website also has the rules and regulations, and any news about tennis without having anything be strictly to the professional league.
These are both educational YouTube channels pages specifically dedicated to teaching people how to play tennis. You can get tips and tricks on how to play tennis, how to perfect your hits, and how to improve on what you already know. They also include videos telling you how you can dissect other players skills and apply them to your own game to get better. You can also learn about the professional players' hits and what they do to be the best of the best. Watching a few of each of their videos will surely help you out to learn more about how you can get better at tennis.
Wet Tennis Ball
on a Wet Court